Home
Class 12
PHYSICS
When a certain circuit consistance of a ...

When a certain circuit consistance of a constant emf . E, an inductance L and a resistance R is closed, the current in it increase with time according, curve 1. After one parameter (E, Lor R) is changed , the increase in current follows curve 2, when the circuit is closed second time . Which parameter was changed and in what direction :-

A

L is increased

B

L is decreased

C

R is increased

D

R is decreased

Text Solution

Verified by Experts

The correct Answer is:
a
Promotional Banner

Topper's Solved these Questions

  • ELECTRO MAGNETIC INDUCTION

    MOTION|Exercise EXERCISE-3 (Assertion & Reasoning)|18 Videos
  • ELECTRO MAGNETIC INDUCTION

    MOTION|Exercise EXERCISE-4| Section A (Prevous Years Problems )|28 Videos
  • ELECTRO MAGNETIC INDUCTION

    MOTION|Exercise EXERCISE-1|72 Videos
  • Electrical Instrument

    MOTION|Exercise EXERCISE -3|16 Videos
  • ELECTRO MAGNETIC WAVES

    MOTION|Exercise EXERCISE - 3 (SECTION - B)|8 Videos
MOTION-ELECTRO MAGNETIC INDUCTION-EXERCISE-2 (Objective problems (Analytical questions))
  1. A coil of copper wire is connected in series with a bulb, a battery an...

    Text Solution

    |

  2. The inductance of a solenoid is 5 henery and its resistance id 5 Omega...

    Text Solution

    |

  3. When a certain circuit consistance of a constant emf . E, an inductanc...

    Text Solution

    |

  4. An LR circuit with a battery is connected at t=0. Which of the follow...

    Text Solution

    |

  5. During 0.1 sec. current in a coil increase from 1A to 1.5 A . If induc...

    Text Solution

    |

  6. A closely wound coil of 100 turns and area of cross-section 1cm^(2) ha...

    Text Solution

    |

  7. In the circuit shown in the figure, what is the value of I(1) just aft...

    Text Solution

    |

  8. Pure inductors each of inductance 3 H are connected as shown in figure...

    Text Solution

    |

  9. The time constant of an inductance coil is 2 xx 10^(-3) s. When a 90 O...

    Text Solution

    |

  10. A toroidal solenoid with an air core has an average radius of 15 cm , ...

    Text Solution

    |

  11. A circular iron, core supports N turns . If a current I produces a mag...

    Text Solution

    |

  12. The self inductance of a toroid is :-

    Text Solution

    |

  13. In Fig (a) and (b), two air-cored solenoids P and Q have been shows. T...

    Text Solution

    |

  14. A small square loop of wire of side l is placed inside a large square ...

    Text Solution

    |

  15. A player with 3 meter long iron rod runs toward east with a speed of ...

    Text Solution

    |

  16. A 10-meter wire is kept in east-west direction. It is falling down wit...

    Text Solution

    |

  17. A conducting rod of length 2l is rotating with constant angular speed ...

    Text Solution

    |

  18. A conducting rod of 1m length rotating with a frequency of 50 rev/sec....

    Text Solution

    |

  19. A semicircle loop PQ of radius 'R' is moved with velocity 'v' in trans...

    Text Solution

    |

  20. A car moves up on a plane road. The induced emf in the axle connecting...

    Text Solution

    |